measure of humidity

Humidity refers to the amount of water vapor in the air.
measure of humidity 						Instrument that registers variations in the moisture content of the air by measuring the deformation of an object that is affected by humidity.				  							Instrument comprised of wet and dry thermometers that register air humidity.

hygrograph

Instrument that registers variations in the moisture content of the air by measuring the deformation of an object that is affected by humidity.

psychrometer

Instrument comprised of wet and dry thermometers that register air humidity.